package com.wc.AlgoOJ_homework.AlgoOJ_BL1.B_修改数组;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.StringTokenizer;
import java.util.TreeSet;

/**
 * @Author congge
 * @Date 2024/3/30 9:04
 * @description http://43.138.190.70:8888/p/143?tid=65f926e1f748afd09501f854
 */
public class Main {
    static FastReader sc = new FastReader();
    static PrintWriter out = new PrintWriter(System.out);
    static int N = 100010;
    static int[] a = new int[N];
    static int n;

    public static void main(String[] args) {
        n = sc.nextInt();
        for (int i = 1; i <= n; i++) a[i] = sc.nextInt();
        TreeSet<Integer> set = new TreeSet<>();
        for (int i = 1; i <= 1000000; i++) set.add(i);
        for (int i = 1; i <= n; i++) {
            if (set.contains(a[i])) {
                out.print(a[i] + " ");
                set.remove(a[i]);
            } else {
                // 大于或者等于
                int num = set.ceiling(a[i]);
                set.remove(num);
                out.print(num + " ");
//                for (int num : set) {
//                    if (num > a[i]) {
//                        out.print(num + " ");
//                        set.remove(num);
//                        break;
//                    }
//                }
            }
        }
        out.flush();
    }
}

class FastReader {
    StringTokenizer st;
    BufferedReader br;

    FastReader() {
        br = new BufferedReader(new InputStreamReader(System.in));
    }

    String next() {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }

    int nextInt() {
        return Integer.parseInt(next());
    }

    String nextLine() {
        String s = "";
        try {
            s = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return s;
    }

    long nextLong() {
        return Long.parseLong(next());
    }

    double nextDouble() {
        return Double.parseDouble(next());
    }

    // 是否由下一个
    boolean hasNext() {
        while (st == null || !st.hasMoreTokens()) {
            try {
                String line = br.readLine();
                if (line == null)
                    return false;
                st = new StringTokenizer(line);
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return true;
    }
}
